Connet develops high-stability, high-performance desktop or modular single longitudinal mode (SLM) single frequency (SF) based semiconductor laser stabilized laser sources. The output spectral linewidth of narrow linewidth DFB Single Frequency Diode Laser is generally on the order of tens of kHz, even down to a few kHz, highly dependent on the level of the drive circuit. Connet uses high-precision constant current and constant temperature drive circuits with automatic power control (APC) and other functional designs such as high isolation optical fiber isolator to achieve high stability output, without mode-hop concerns.